Rhodium(0) nano particles within an organic cage with better durability and gated activity for hydrogen generation reaction

Li, Qiaosheng; Gu, Defa; Cui, Chengqian; Pan, Ganghuo; Yu, Dongdong; Liu, Yuzhou

doi:10.1016/j.ijhydene.2022.03.086

Cited by 5 publications

(4 citation statements)

References 62 publications

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“…The cage expansion is consistent with our previous reports. [37] After solvent removal, calcination at 450 °C under air for 6 h led to a black powder (Si-RuO x @C).…”

Section: Resultsmentioning

confidence: 99%

“…Recently we developed a facile synthesis of an organic cage (COP1-T) with the diameters of several nanometers, [36] and subsequently show effectiveness of trapping various metal ions through coordinating carboxylate groups on its surface. [37,38] It was also demonstrated that unique selectivity could be obtained using these assemblies as catalysts for several kinds of reaction. Considering the suitability as carbon source for COP1-T with 72 phenyl rings per cage, we decided to evaluate the possibility of preorganizing ruthenium ions within a cage followed by calcination for a stable carbon-coated ruthenium OER catalyst.…”

Section: Introductionmentioning

confidence: 98%

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Nano Si‐Doped Ruthenium Oxide Particles from Caged Precursors for High‐Performance Acidic Oxygen Evolution

et al. 2023

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RuO2 is well known as the benchmark acidic oxygen evolution reaction (OER) catalyst, but its practical application has been impeded by its limited durability. Herein, it is presented that the stability of ruthenium oxide can be significantly improved by pretrapping RuCl3 precursors within a cage compound possessing 72 aromatic rings, which leads to well carbon‐coated RuOx particles (Si‐RuOx@C) after calcination. The catalyst survives in 0.5 M H2SO4 for an unprecedented period of 100 hours at 10 mA cm−2 with minimal overpotential change during OER. In contrast, RuOx prepared from similar non‐tied compounds doesn't exhibit such catalytic activity, highlighting the importance of the preorganization of Ru precursors within the cage prior to calcination. In addition, the overpotential at 10 mA cm−2 in acid solution is only 220 mV, much less than that of commercial RuO2. X‐ray absorption fine structure (FT‐EXAFS) reveals the Si doping through unusual Ru–Si bond, and density functional theory (DFT) calculation reveals the importance of the Ru‐Si bond in enhancing both the activity and stability of the catalyst.

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“…The cage expansion is consistent with our previous reports. [37] After solvent removal, calcination at 450 °C under air for 6 h led to a black powder (Si-RuO x @C).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Nano Si‐Doped Ruthenium Oxide Particles from Caged Precursors for High‐Performance Acidic Oxygen Evolution

et al. 2023

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“…Additionally, the reported Rh clusters (average size: 1.9 nm) could also achieve on-demand activity through the trans – cis conformation interchange of azobenzene groups by UV or Vis light irradiation. 39 These studies represent significant advancements in the field of switchable catalysis for H 2 generation, while inspiring chemists to explore and develop more complex biomimetic catalysts in the future.…”

Section: Applications In Advanced Catalysismentioning

confidence: 99%

The marriage of porous cages and metal clusters for advanced catalysis

Yang

Chen

et al. 2023

Mater. Chem. Front.

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“…Effective catalysts are required to lower the energy barriers of the dehydrogenation process and, thereby, render it more efficient . Despite the fact that precious metals such as Pt, Ru, Rh, and Pd are among the most active catalysts for AB hydrolysis, the high cost and low abundance of these compounds in the earth’s crust hinders their widespread application. As a result, there is an extreme urge to seek inexpensive catalysts with appreciable catalytic activity, thereby improving the performance of AB hydrolysis for hydrogen production .…”

Section: Introductionmentioning

confidence: 99%

Exposed Facet Tailoring of Ni/Cu Catalysts for Boosting Dehydrogenation of Ammonia Borane

Li,

Zhang,

Wang

et al. 2023

ACS Appl. Nano Mater.

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The design of efficient and inexpensive nanocatalysts for the room-temperature hydrolysis of ammonia borane (AB) is important for its practical application in hydrogen (H 2 )based fuel cells. In this study, Cu micron-crystals with different exposed crystal facets are successfully prepared by a pseudomorphic conversion process. Ni/Cu catalysts are synthesized through an in situ one-pot liquid reaction method by applying these Cu micrometer crystals as supports. Contrastive studies demonstrate the obviously close correlativity between catalytic capacity and the crystal facets for Ni/Cu catalysts, but not for the pure Cu or Cu 2 O catalysts. The Ni/Cu cubes with (100) facets exposed deliver a markedly enhanced effect in AB dehydrogenation compared to truncated octahedra and octahedra with less (100) facets. The superior catalytic activity of Ni/Cu cubes can be attributed to their capacity to dissociatively adsorb H 2 O and AB molecules on Ni/ Cu(100) surface, which is supported by the results of first-principle calculations. Furthermore, the cycling performance is investigated, and Ni/Cu cubes have been found to have a superior performance. This research could lead to further exploration of the facet effect toward rational design of catalysts for AB dehydrogenation.

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Rhodium(0) nano particles within an organic cage with better durability and gated activity for hydrogen generation reaction

Cited by 5 publications

References 62 publications

Nano Si‐Doped Ruthenium Oxide Particles from Caged Precursors for High‐Performance Acidic Oxygen Evolution

Nano Si‐Doped Ruthenium Oxide Particles from Caged Precursors for High‐Performance Acidic Oxygen Evolution

The marriage of porous cages and metal clusters for advanced catalysis

Exposed Facet Tailoring of Ni/Cu Catalysts for Boosting Dehydrogenation of Ammonia Borane

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