Transition metal tuned semiconductor photocatalyst CuCo/β-SiC catalyze hydrolysis of ammonia borane to hydrogen evolution

Li, Haojie; Yan, Yunfei; Feng, Shuai; Zhu, Yilin; Chen, Yanrong; Hu, Fan; Zhang, Li; Yang, Zhongqing

doi:10.1016/j.ijhydene.2019.02.034

Cited by 19 publications

(9 citation statements)

References 35 publications

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“…The total reaction equation can be expressed as eq . The results are consistent with those reported in the literature. ,,, …”

Section: Results and Discussionsupporting

confidence: 93%

“…In the previous study, we have studied the hydrolysis process of ammonia borane, which confirmed the feasibility of photocatalytic AB hydrolysis to produce hydrogen. 33,34 However, there are few reports on the photocatalytic hydrolysis of ammonia borane by rGO-modified TiO 2 . In this study, we successfully prepared rGO/TiO 2 , and the photocatalytic performance of AB hydrolysis for hydrogen production was studied.…”

Section: Introductionmentioning

confidence: 99%

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Efficient Hydrogen Production by an rGO/TiO₂ Composite Material from Ammonia Borane Hydrolysis in a Photocatalytic Reactor

et al. 2021

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Aimed at achieving high efficiency of photocatalytic hydrogen production from ammonia borane (NH 3 BH 3 , AB), a reduced graphene oxide (rGO)-modified TiO 2 photocatalyst was proposed for hydrogen production. In this study, rGO/TiO 2 photocatalysts with different rGO contents were prepared and characterized by XRD, UV−vis DRS, FTIR, Raman, and SEM. The experimental results showed that addition of rGO can reduce the band gap energy of TiO 2 , and the band gap energy of rGO/TiO 2 varies with the content of rGO, and 1% rGO/TiO 2 has the lowest band gap energy of 2.96 eV. This indicates that the modification of TiO 2 by rGO not only increases the probability of electron transition but also promotes the separation of photoelectron and hole pairs due to the good conductivity of rGO so as to improve the quantum efficiency of photocatalysis. In addition, compared with pure TiO 2 , rGO/TiO 2 shows a certain photocatalytic activity under the condition of light irradiation. Among the rGO/TiO 2 photocatalysts with different contents of rGO, 1% rGO/TiO 2 shows the best photocatalytic performance of ammonia borane hydrolysis, and the value of turnover frequency is 1088.93 μmol•min −1 •g −1 . Furthermore, the catalyst 1% rGO/TiO 2 shows perfect reusability, and its catalytic activity did not decrease significantly even after five reaction cycles.

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“…The total reaction equation can be expressed as eq . The results are consistent with those reported in the literature. ,,, …”

Section: Results and Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Efficient Hydrogen Production by an rGO/TiO₂ Composite Material from Ammonia Borane Hydrolysis in a Photocatalytic Reactor

et al. 2021

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“…425 Moving from previous reports on the photocatalytic AB hydrolysis by means of classical TiO 2 -based materials, 643,644 Yan and co-workers simulated the photocatalyzed AB hydrolysis by constructing a bimetallic/SiC composite able to promote the hydrogen release. 645 In particular, these authors combined β-SiC with Cu and Co in order to tune the band gap of SiC and allow AB photocatalytic hydrolysis under visible-light irradiation. Indeed, the metal doping was demonstrated to reduce the β-SiC band gap thus bathochromically shifting its response to radiation and increasing the photocatalytic quantum efficiency of AB hydrolysis.…”

Section: Photochemical Processesmentioning

confidence: 99%

“…However, the low kinetics of AB hydrolysis makes imperative the development of appropriate catalysts to promote H 2 release . Moving from previous reports on the photocatalytic AB hydrolysis by means of classical TiO 2 -based materials, , Yan and co-workers simulated the photocatalyzed AB hydrolysis by constructing a bimetallic/SiC composite able to promote the hydrogen release . In particular, these authors combined β-SiC with Cu and Co in order to tune the band gap of SiC and allow AB photocatalytic hydrolysis under visible-light irradiation.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

et al. 2021

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There is an obvious gap between efforts dedicated to the control of chemicophysical and morphological properties of catalyst active phases and the attention paid to the search of new materials to be employed as functional carriers in the upgrading of heterogeneous catalysts. Economic constraints and common habits in preparing heterogeneous catalysts have narrowed the selection of active-phase carriers to a handful of materials: oxide-based ceramics (e.g. Al2O3, SiO2, TiO2, and aluminosilicates–zeolites) and carbon. However, these carriers occasionally face chemicophysical constraints that limit their application in catalysis. For instance, oxides are easily corroded by acids or bases, and carbon is not resistant to oxidation. Therefore, these carriers cannot be recycled. Moreover, the poor thermal conductivity of metal oxide carriers often translates into permanent alterations of the catalyst active sites (i.e. metal active-phase sintering) that compromise the catalyst performance and its lifetime on run. Therefore, the development of new carriers for the design and synthesis of advanced functional catalytic materials and processes is an urgent priority for the heterogeneous catalysis of the future. Silicon carbide (SiC) is a non-oxide semiconductor with unique chemicophysical properties that make it highly attractive in several branches of catalysis. Accordingly, the past decade has witnessed a large increase of reports dedicated to the design of SiC-based catalysts, also in light of a steadily growing portfolio of porous SiC materials covering a wide range of well-controlled pore structure and surface properties. This review article provides a comprehensive overview on the synthesis and use of macro/mesoporous SiC materials in catalysis, stressing their unique features for the design of efficient, cost-effective, and easy to scale-up heterogeneous catalysts, outlining their success where other and more classical oxide-based supports failed. All applications of SiC in catalysis will be reviewed from the perspective of a given chemical reaction, highlighting all improvements rising from the use of SiC in terms of activity, selectivity, and process sustainability. We feel that the experienced viewpoint of SiC-based catalyst producers and end users (these authors) and their critical presentation of a comprehensive overview on the applications of SiC in catalysis will help the readership to create its own opinion on the central role of SiC for the future of heterogeneous catalysis.

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“…Energy cutoff was set to a value of 350 eV. The other parameter settings, such as optimization energy, maximum force, and maximum displacement, were set to 10 –5 eV, 1 × 10 –5 eV, 0.03 eV/Å, and 0.001 Å, respectively. , …”

Section: Experiments and Dft Calculationsmentioning

confidence: 99%

Highly Efficient Photothermal Difunctional Catalysts To Enhance Ammonia Borane Hydrolysis for Hydrogen Evolution

Yan

Feng

et al. 2020

Energy Fuels

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In this study, β-SiC NWs, Ru/β-SiC NWs, Cu/β-SiC NWs, and RuCu/β-SiC NWs were prepared to investigate photothermal synergistic catalytic AB hydrolysis to produce hydrogen. The experimental and theoretical calculation results show the band gap values of prepared β-SiC NWs, Cu/β-SiC NWs, Ru/β-SiC NWs, and RuCu/β-SiC NWs are 2.36, 1.95, 1.71, and 1.49 eV, respectively. The Ru, Cu nanocluster deposited on β-SiC NWs is conducive to promote the separation and transport of photoinduced electron and hole pairs and increase the transition probability of photoinduced electrons. The transition metal catalyst Cu/β-SiC NWs modified with Ru dopant is beneficial to improve its catalytic activity; with the increase of blending ratio Ru/Cu, the catalytic activity increases gradually; when the mass ratio of Cu:Ru is 2:3, the catalyst Cu 0.4 Ru 0.6 /β-SiC NWs have the highest catalytic performance and fairly good reusability in catalyzing AB hydrolysis, which is much better than the catalytic performance of catalyst Cu/β-SiC NWs and comparable to Ru/β-SiC NWs. In the RuCu alloy nanoclusters of RuCu/β-SiC NWs, the electron conveyed from the Cu atom to the Ru atom and forms the of heterojunction Ru − −Cu + species, which further enhance the photothermal synergic catalytic performance of AB hydrolysis catalyzed by the RuCu/β-SiC NWs. The property of bimetallic synergy is of great significance in improving catalyst activity and reducing catalyst cost.

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Transition metal tuned semiconductor photocatalyst CuCo/β-SiC catalyze hydrolysis of ammonia borane to hydrogen evolution

Cited by 19 publications

References 35 publications

Efficient Hydrogen Production by an rGO/TiO₂ Composite Material from Ammonia Borane Hydrolysis in a Photocatalytic Reactor

Efficient Hydrogen Production by an rGO/TiO₂ Composite Material from Ammonia Borane Hydrolysis in a Photocatalytic Reactor

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Highly Efficient Photothermal Difunctional Catalysts To Enhance Ammonia Borane Hydrolysis for Hydrogen Evolution

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Transition metal tuned semiconductor photocatalyst CuCo/β-SiC catalyze hydrolysis of ammonia borane to hydrogen evolution

Cited by 19 publications

References 35 publications

Efficient Hydrogen Production by an rGO/TiO2 Composite Material from Ammonia Borane Hydrolysis in a Photocatalytic Reactor

Efficient Hydrogen Production by an rGO/TiO2 Composite Material from Ammonia Borane Hydrolysis in a Photocatalytic Reactor

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Highly Efficient Photothermal Difunctional Catalysts To Enhance Ammonia Borane Hydrolysis for Hydrogen Evolution

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Efficient Hydrogen Production by an rGO/TiO₂ Composite Material from Ammonia Borane Hydrolysis in a Photocatalytic Reactor

Efficient Hydrogen Production by an rGO/TiO₂ Composite Material from Ammonia Borane Hydrolysis in a Photocatalytic Reactor