The Synthesis of Sub-Nano-Thick Pd Nanobelt–Based Materials for Enhanced Hydrogen Evolution Reaction Activity

Ni, Bing; Zhang, Qinghua; Chen, Ouyang; Zhang, Simin; Yu, Bowei; Zhuang, Jian; Gu, Lin; Wang, Xun

doi:10.31635/ccschem.019.20190054

Cited by 13 publications

(9 citation statements)

References 35 publications

(54 reference statements)

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“…[ 1–4 ] As the key raw material for hydrogen production in electrochemical and photocatalytic water splitting processes, water resource has to be used more efficiently due to the increasing water shortage. [ 5–8 ] The energy efficiency of water molecule dissociation also needs to be improved in water conversion involved ammonia fertilizer industry, [ 9–13 ] natural gas wet reform and water−gas shift reaction (WGSR). [ 14,15 ] The constraints of non‐renewable energy sources also should be overcome.…”

Section: Introductionmentioning

confidence: 99%

Engineering Bimodal Oxygen Vacancies and Pt to Boost the Activity Toward Water Dissociation

Shen

Liu

Wen

et al. 2021

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Water dissociation is the rate‐limiting step of several energy‐related reactions due to the high energy barrier required for breaking the oxygen–hydrogen bond. In this work, a bimodal oxygen vacancy (VO) catalysis strategy is adopted to boost the efficient water dissociation on Pt nanoparticles. The single facet‐exposed TiO2 surface and NiOx nanocluster possess two modes of VO different from each other. In ammonia borane hydrolysis, the highest catalytic activity among Pt‐based materials is achieved with the turnover frequency of 618 min−1 under alkaline‐free conditions at 298 K. Theoretical simulation and characterization analyses reveal that the bimodal VO significantly promotes the water dissociation in two ways. First, an ensemble‐inducing effect of Pt and VO in TiO2 drives the activation of water molecules. Second, an electron promoter effect induced by the electron transfer from VO in NiOx to Pt further enhances the ability of Pt to dissociate water and ammonia borane. This insight into bimodal VO catalysis establishes a new avenue to rationally design heterogeneous catalytic materials in the energy chemistry field.

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Section: Introductionmentioning

confidence: 99%

Engineering Bimodal Oxygen Vacancies and Pt to Boost the Activity Toward Water Dissociation

Shen

Liu

Wen

et al. 2021

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“…Noble metal (NM) nanocrystals have received a great deal of attention for their widespread applications in catalysis, photonics, electronics, and biomedicine. − Among various NMs, palladium (Pd) is one of the predominantly used NMs because of its optimum affinity for hydrogen, which allows its potential application toward various hydrogen-related catalytic reactions. − Pd is a 4d transition metal that adopts thermodynamically stable face-centered cubic ( fcc ) crystal-phase structure in the bulk (determined by the total electronic energy of Pd). , Although Pd-based nanocrystals with different shapes, nanostructures, and compositions have been rationally designed and synthesized, it remains a major challenge to explore their novel crystal-phase structures and further understand the evolution mechanisms at atomic levels. − This is because of the inevitable rearrangement of atoms during the evolutions/transformations of crystal-phase structures. When downsizing to nanodimensions, in contrast, the surface energy of NM nanocrystals becomes the important factor, making it possible to explore novel crystal-phase structures (with different atomic packing sequences) that cannot be usually achieved in the bulk counterpart materials with the high total bulk energy. , …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Crystal-Phase Engineering of Mesoporous Palladium–Boron Alloy Nanoparticles

Kong

et al. 2020

ACS Cent. Sci.

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Rational design and synthesis of noble metal nanomaterials with desired crystal phases (atomic level) and controllable structures/morphologies (mesoscopic level) are paramount for modulating their physiochemical properties. However, it is challenging to simultaneously explore atomic crystal-phase structures and ordered mesoscopic morphologies. Here, we report a simple synergistic templating strategy for the preparation of palladium–boron (Pd–B) nanoparticles with precisely controllable crystal-phases and highly ordered mesostructures. The engineering of crystal-phase structures at atomic levels is achieved by interstitially inserting metallic B atoms into face-centered cubic mesoporous Pd ( fcc -mesoPd) confined in a mesoporous silica template. With the gradual insertion of B atoms, fcc- mesoPd is transformed into fcc -mesoPd 5 B, hcp -mesoPd 2 B with randomly distributed B atoms ( hcp -mesoPd 2 B-r), and hcp -mesoPd 2 B with an atomically ordered B sequence ( hcp -mesoPd 2 B-o) while preserving well-defined mesostructures. This synergistic templating strategy can be extended to engineer crystal-phase structures with various mesostructures/morphologies, including nanoparticles, nanobundles, and nanorods. Moreover, we investigate the crystal-phase-dependent catalytic performance toward the reduction reaction of p -nitrophenol and find that hcp -mesoPd 2 B-o displays much better catalytic activity. This work thus paves a new way for the synthesis of hcp -Pd 2 B nanomaterials with mesoscopically ordered structure/morphology and offers new insights of fcc -to- hcp evolution mechanisms which could be applied on other noble metal-based nanomaterials for various targeted applications.

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“…In recent years, our group has successfully synthesized many types of SNMs using hydrothermal/solvothermal methods. [ 51 , 52 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 ] For instance, the nickel hydroxylphosphate single‐wall nanotubes were prepared in the mixture solvents of water and DMF, [ 51 ] and the tungsten oxide nanobelts with thickness of 1 nm were synthesized in the mixture solvents of water, oleylamine, and cyclohexane. [ 52 ] With the advantages of simple manipulation, controllable adjustment of precursor ratios and high‐purity products, the hydrothermal/solvothermal methods become an efficient means for the universal synthesis of SNMs.…”

Section: Synthesis Of Snmsmentioning

confidence: 99%

Recent Progress of Sub‐Nanometric Materials in Photothermal Energy Conversion

Wang

2021

Advanced Science

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Sub-nanometric materials (SNMs) are an attractive scope in recent years due to their atomic-level size and unique properties. Among various performances of SNMs, photothermal energy conversion is one of the most important ones because it can efficiently utilize the light energy. Herein, the SNMs with photothermal energy conversion behaviors and their applications are reviewed. First, a hydrothermal/solvothermal method for the synthesis of SNMs is systematically discussed, including the LaMer pathway and the cluster-nuclei coassembly pathway. Based on this synthetic strategy, many kinds of SNMs with different morphologies are successfully prepared, such as nanorings, nanowires, nanosheets, and nanobelts. These SNMs exhibit excellent photothermal performance under the laser or solar irradiation according to their different light absorption ranges. These enhanced absorption performances of SNMs are induced by the mechanism of plasmonic localized heating or nonradiative relaxation. Finally, the applications of the photothermal SNMs are illustrated. The SNMs with photothermal behaviors can be widely applied in the fields of solar vapor generation, biomedicine, and light-responsive composites construction. It is hoped that this review can provide new viewpoints and profound understanding to the SNMs in photothermal energy conversion.

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The Synthesis of Sub-Nano-Thick Pd Nanobelt–Based Materials for Enhanced Hydrogen Evolution Reaction Activity

Abstract: Citation denotes calendar and volume year of first online publication.

Cited by 13 publications

References 35 publications

Engineering Bimodal Oxygen Vacancies and Pt to Boost the Activity Toward Water Dissociation

Engineering Bimodal Oxygen Vacancies and Pt to Boost the Activity Toward Water Dissociation

Synthesis and Crystal-Phase Engineering of Mesoporous Palladium–Boron Alloy Nanoparticles

Recent Progress of Sub‐Nanometric Materials in Photothermal Energy Conversion

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