Lattice-confined Ru clusters with high CO tolerance and activity for the hydrogen oxidation reaction

Zhou, Yuanyuan; Xie, Zhenyang; Jiang, Jinxia; Wang, Jian; Song, Xiaoyun; He, Qian; Ding, Wei

doi:10.1038/s41929-020-0446-9

Cited by 362 publications

(264 citation statements)

References 39 publications

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“…2a ). In particular, HEA SNWs/C exhibits a high and steady current density with the increased potential, whereas a gradual decay in the current density was observed for HEA NPs/C, suggesting that HEA SNWs/C can be serve as a highly efficient catalyst for HOR 22 . Moreover, the HEA SNWs/C for HOR was evaluated in N 2 -saturated 0.1 M KOH solution to measure the anodic current.…”

Section: Resultsmentioning

confidence: 95%

Subnanometer high-entropy alloy nanowires enable remarkable hydrogen oxidation catalysis

et al. 2021

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High-entropy alloys (HEAs) with unique physicochemical properties have attracted tremendous attention in many fields, yet the precise control on dimension and morphology at atomic level remains formidable challenges. Herein, we synthesize unique PtRuNiCoFeMo HEA subnanometer nanowires (SNWs) for alkaline hydrogen oxidation reaction (HOR). The mass and specific activities of HEA SNWs/C reach 6.75 A mgPt+Ru−1 and 8.96 mA cm−2, respectively, which are 2.8/2.6, 4.1/2.4, and 19.8/18.7 times higher than those of HEA NPs/C, commercial PtRu/C and Pt/C, respectively. It can even display enhanced resistance to CO poisoning during HOR in the presence of 1000 ppm CO. Density functional theory calculations reveal that the strong interactions between different metal sites in HEA SNWs can greatly regulate the binding strength of proton and hydroxyl, and therefore enhances the HOR activity. This work not only provides a viable synthetic route for the fabrication of Pt-based HEA subnano/nano materials, but also promotes the fundamental researches on catalysis and beyond.

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Section: Resultsmentioning

confidence: 95%

Subnanometer high-entropy alloy nanowires enable remarkable hydrogen oxidation catalysis

et al. 2021

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“…Hydrogen energy economy is one of the important ways to improve the use of clean and renewable energy, and has important economic and environmental significance. [ 1–5 ] The advantage of alkaline polymer electrolyte fuel cells (APEFCs) and alkaline water electrolysis (AWE) is the use of nonprecious metal catalysts, which is expected to significantly reduce the cost and promote the practical application of hydrogen energy. [ 6–8 ] At present, major obstacles to the application of APEFC and AWE are the slow kinetics of hydrogen electrode reactions and oxygen electrode reactions.…”

Section: Figurementioning

confidence: 99%

Phase‐Separated Mo–Ni Alloy for Hydrogen Oxidation and Evolution Reactions with High Activity and Enhanced Stability

Song¹,

Jin²,

Zhang

et al. 2021

Advanced Energy Materials

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The development of alkaline polymer electrolyte fuel cells and alkaline water electrolysis requires nonprecious metal catalysts for the hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER). Herein, it is reported a phase‐separated Mo–Ni alloy (PS‐MoNi) that is composed of Mo metal and embedded Ni metal nanoparticles. The PS‐MoNi shows excellent hydrogen electrode activity with a high exchange current density (−4.883 mA cm−2), which is comparable to the reported highest value for non‐noble catalysts. Moreover, the amorphous phase‐separated Mo–Ni alloy has better structural and electrochemical stability than the intermetallic compound Mo–Ni alloy (IC‐MoNi). The breakdown potential of PS‐MoNi is as high as 0.32 V, which is much higher than that of reported IC‐MoNi. The X‐ray absorption near edge structure (XANES) and density functional theory (DFT) calculations indicate the electrons transfer from Mo to Ni for PS‐MoNi, leading to suitable adsorption free energies of H* (ΔGH*) on the surface of Mo. This means that the electron density modulation of Mo metal by embedded Ni metal nanoparticles can produce excellent HOR and HER performance.

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“…[ 18 ] Therefore, developing non‐PGM electrocatalysts with high HOR electrocatalytic activity and durability is of significant importance to cost‐effective PEMFCs/AEMFCs and has drawn considerable research interest. [ 19–21 ]…”

Section: Introductionmentioning

confidence: 99%

“…[ 29–31 ] In a nutshell, metallic surfaces are more favored by the HOR, and only a few nonmetallic compounds show noticeable HOR activity. [ 19 ] Until now, the exact reasons remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Non‐Platinum Group Metal Electrocatalysts toward Efficient Hydrogen Oxidation Reaction

Zhao

Chen

Sun

et al. 2021

Adv Funct Materials

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Developing non‐platinum group metal (non‐PGM) electrocatalysts for the hydrogen oxidation reaction (HOR) represents the efforts towards the more economical use of hydrogen fuel cells and hydrogen energy, which has attracted tremendous attention recently. However, non‐PGM electrocatalysts for the HOR are still in their early development stages as compared with the significant advances in those for the oxygen reduction reaction and hydrogen evolution reaction. Herein, this paper summarizes the recent progresses and highlights the key challenges for the rational design of non‐PGM electrocatalysts, aiming to promote the development of non‐PGM HOR electrocatalysts. Fundamental understandings of the HOR mechanism are firstly reviewed, where theoretical interpretations on the low HOR kinetics in alkaline media, including the hydrogen binding energy theory, the bifunctional mechanism, and the water molecule reorganization, are particularly discussed. Subsequently, progresses of typical non‐PGM HOR electrocatalysts in acid and alkaline media are summarized separately. For the HOR under alkaline conditions, the superiorities and challenges of Ni‐based catalysts are discussed with a particular focus as they are the most promising non‐PGM electrocatalysts. Finally, this paper highlights the challenges and provide perspectives on the future development directions of non‐PGM HOR electrocatalysts.

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Lattice-confined Ru clusters with high CO tolerance and activity for the hydrogen oxidation reaction

Cited by 362 publications

References 39 publications

Subnanometer high-entropy alloy nanowires enable remarkable hydrogen oxidation catalysis

Subnanometer high-entropy alloy nanowires enable remarkable hydrogen oxidation catalysis

Phase‐Separated Mo–Ni Alloy for Hydrogen Oxidation and Evolution Reactions with High Activity and Enhanced Stability

Non‐Platinum Group Metal Electrocatalysts toward Efficient Hydrogen Oxidation Reaction

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