Self-Activated Catalytic Sites on Nanoporous Dilute Alloy for High-Efficiency Electrochemical Hydrogen Evolution

Yaqian Yu; Kang Jiang; Min Luo; Yang Zhao; Jiao Lan; Ming Peng; Frank M.F. De Groot; Yongwen Tan

doi:10.1021/acsnano.0c10885

Self-Activated Catalytic Sites on Nanoporous Dilute Alloy for High-Efficiency Electrochemical Hydrogen Evolution

Yaqian Yu
, Kang Jiang
, Min Luo
, Yang Zhao
, Jiao Lan
, Ming Peng
, Frank M.F. De Groot
, Yongwen Tan^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Design and synthesis of effective electrocatalysts for hydrogen evolution reaction (HER) in wide pH environments are critical to reduce energy losses in water electrolyzers. Here, by using a self-activation strategy, we construct an atomic nickel (Ni) decorated nanoporous iridium (Ir) catalyst, which can create the reaction-favorable chemical environment and maximize the electrochemical active surface area (ECSA), enabling efficient HER over a wide pH range. By using operando X-ray absorption spectroscopy and theoretical calculations, the atomic Ni sites are identified as the synergistic sites, which not only accelerate the water dissociation under operation conditions but also activate the surface Ir sites thus leading to the efficient H2 generation. This work highlights the significance of atomic-level decorating strategy which can optimize the activity of surface Ir atoms with negligible sacrifice of the ECSA.

Original language	English
Pages (from-to)	5333-5340
Number of pages	8
Journal	ACS Nano
Volume	15
Issue number	3
DOIs	https://doi.org/10.1021/acsnano.0c10885
Publication status	Published - 23 Mar 2021

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant 51771072), the Youth 1000 Talent Program of China, Fundamental Research Funds for the Central Universities, the Outstanding Youth Scientist Foundation of Hunan Province (Grant 2020JJ2006), and Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research Project (No. 71860007). The authors thank Y.-R. L. and T.-S. C. for the measurement of XAS at Beamline No. 01C1 of Taiwan Light Source.

Publisher Copyright:
©

Funding

This work was supported by the National Natural Science Foundation of China (Grant 51771072), the Youth 1000 Talent Program of China, Fundamental Research Funds for the Central Universities, the Outstanding Youth Scientist Foundation of Hunan Province (Grant 2020JJ2006), and Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research Project (No. 71860007). The authors thank Y.-R. L. and T.-S. C. for the measurement of XAS at Beamline No. 01C1 of Taiwan Light Source.

Keywords

atomic engineering
dealloying
hydrogen evolution reaction
nanoporous metal
operando X-ray absorption spectroscopy
synergistic effect

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10.1021/acsnano.0c10885

acsnano.0c10885Final published version, 4.17 MBLicence: Taverne

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title = "Self-Activated Catalytic Sites on Nanoporous Dilute Alloy for High-Efficiency Electrochemical Hydrogen Evolution",

abstract = "Design and synthesis of effective electrocatalysts for hydrogen evolution reaction (HER) in wide pH environments are critical to reduce energy losses in water electrolyzers. Here, by using a self-activation strategy, we construct an atomic nickel (Ni) decorated nanoporous iridium (Ir) catalyst, which can create the reaction-favorable chemical environment and maximize the electrochemical active surface area (ECSA), enabling efficient HER over a wide pH range. By using operando X-ray absorption spectroscopy and theoretical calculations, the atomic Ni sites are identified as the synergistic sites, which not only accelerate the water dissociation under operation conditions but also activate the surface Ir sites thus leading to the efficient H2 generation. This work highlights the significance of atomic-level decorating strategy which can optimize the activity of surface Ir atoms with negligible sacrifice of the ECSA. ",

keywords = "atomic engineering, dealloying, hydrogen evolution reaction, nanoporous metal, operando X-ray absorption spectroscopy, synergistic effect",

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note = "Funding Information: This work was supported by the National Natural Science Foundation of China (Grant 51771072), the Youth 1000 Talent Program of China, Fundamental Research Funds for the Central Universities, the Outstanding Youth Scientist Foundation of Hunan Province (Grant 2020JJ2006), and Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research Project (No. 71860007). The authors thank Y.-R. L. and T.-S. C. for the measurement of XAS at Beamline No. 01C1 of Taiwan Light Source. Publisher Copyright: {\textcopyright} ",

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AU - Lan, Jiao

AU - Peng, Ming

AU - De Groot, Frank M.F.

AU - Tan, Yongwen

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (Grant 51771072), the Youth 1000 Talent Program of China, Fundamental Research Funds for the Central Universities, the Outstanding Youth Scientist Foundation of Hunan Province (Grant 2020JJ2006), and Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research Project (No. 71860007). The authors thank Y.-R. L. and T.-S. C. for the measurement of XAS at Beamline No. 01C1 of Taiwan Light Source. Publisher Copyright: ©

PY - 2021/3/23

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N2 - Design and synthesis of effective electrocatalysts for hydrogen evolution reaction (HER) in wide pH environments are critical to reduce energy losses in water electrolyzers. Here, by using a self-activation strategy, we construct an atomic nickel (Ni) decorated nanoporous iridium (Ir) catalyst, which can create the reaction-favorable chemical environment and maximize the electrochemical active surface area (ECSA), enabling efficient HER over a wide pH range. By using operando X-ray absorption spectroscopy and theoretical calculations, the atomic Ni sites are identified as the synergistic sites, which not only accelerate the water dissociation under operation conditions but also activate the surface Ir sites thus leading to the efficient H2 generation. This work highlights the significance of atomic-level decorating strategy which can optimize the activity of surface Ir atoms with negligible sacrifice of the ECSA.

AB - Design and synthesis of effective electrocatalysts for hydrogen evolution reaction (HER) in wide pH environments are critical to reduce energy losses in water electrolyzers. Here, by using a self-activation strategy, we construct an atomic nickel (Ni) decorated nanoporous iridium (Ir) catalyst, which can create the reaction-favorable chemical environment and maximize the electrochemical active surface area (ECSA), enabling efficient HER over a wide pH range. By using operando X-ray absorption spectroscopy and theoretical calculations, the atomic Ni sites are identified as the synergistic sites, which not only accelerate the water dissociation under operation conditions but also activate the surface Ir sites thus leading to the efficient H2 generation. This work highlights the significance of atomic-level decorating strategy which can optimize the activity of surface Ir atoms with negligible sacrifice of the ECSA.

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Self-Activated Catalytic Sites on Nanoporous Dilute Alloy for High-Efficiency Electrochemical Hydrogen Evolution

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