An Oxygen-Insensitive Hydrogen Evolution Catalyst Coated by a Molybdenum-Based Layer for Overall Water Splitting

Angel T. Garcia-Esparza; Tatsuya Shinagawa; Samy Ould-Chikh; Muhammad Qureshi; Xuyuan Peng; Nini Wei; Dalaver H. Anjum; Alain Clo; Tsu Chien Weng; Dennis Nordlund; Dimosthenis Sokaras; Jun Kubota; Kazunari Domen; Kazuhiro Takanabe

doi:10.1002/anie.201701861

An Oxygen-Insensitive Hydrogen Evolution Catalyst Coated by a Molybdenum-Based Layer for Overall Water Splitting

Angel T. Garcia-Esparza
, Tatsuya Shinagawa
, Samy Ould-Chikh
, Muhammad Qureshi
, Xuyuan Peng
, Nini Wei
, Dalaver H. Anjum
, Alain Clo
, Tsu Chien Weng
, Dennis Nordlund
, Dimosthenis Sokaras
, Jun Kubota
, Kazunari Domen
, Kazuhiro Takanabe

Physics

King Abdullah University of Science and Technology
Center for High Pressure Science & Technology Advanced Research
Stanford Synchrotron Radiation Lightsource
Fukuoka University
University of Tokyo

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

118 Scopus citations

Abstract

For overall water-splitting systems, it is essential to establish O₂-insensitive cathodes that allow cogeneration of H₂ and O₂. An acid-tolerant electrocatalyst is described, which employs a Mo-coating on a metal surface to achieve selective H₂ evolution in the presence of O₂. In operando X-ray absorption spectroscopy identified reduced Pt covered with an amorphous molybdenum oxyhydroxide hydrate with a local structural order composed of polyanionic trimeric units of molybdenum(IV). The Mo layer likely hinders O₂ gas permeation, impeding contact with active Pt. Photocatalytic overall water splitting proceeded using MoO_x/Pt/SrTiO₃ with inhibited water formation from H₂ and O₂, which is the prevailing back reaction on the bare Pt/SrTiO₃ photocatalyst. The Mo coating was stable in acidic media for multiple hours of overall water splitting by membraneless electrolysis and photocatalysis.

Original language	British English
Pages (from-to)	5780-5784
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	56
Issue number	21
DOIs	https://doi.org/10.1002/anie.201701861
State	Published - 15 May 2017

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

electrocatalysis
hydrogen evolution
in operando XAS
photocatalysis
water splitting

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Garcia-Esparza, A. T., Shinagawa, T., Ould-Chikh, S., Qureshi, M., Peng, X., Wei, N., Anjum, D. H., Clo, A., Weng, T. C., Nordlund, D., Sokaras, D., Kubota, J., Domen, K., & Takanabe, K. (2017). An Oxygen-Insensitive Hydrogen Evolution Catalyst Coated by a Molybdenum-Based Layer for Overall Water Splitting. Angewandte Chemie - International Edition, 56(21), 5780-5784. https://doi.org/10.1002/anie.201701861

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title = "An Oxygen-Insensitive Hydrogen Evolution Catalyst Coated by a Molybdenum-Based Layer for Overall Water Splitting",

abstract = "For overall water-splitting systems, it is essential to establish O2-insensitive cathodes that allow cogeneration of H2 and O2. An acid-tolerant electrocatalyst is described, which employs a Mo-coating on a metal surface to achieve selective H2 evolution in the presence of O2. In operando X-ray absorption spectroscopy identified reduced Pt covered with an amorphous molybdenum oxyhydroxide hydrate with a local structural order composed of polyanionic trimeric units of molybdenum(IV). The Mo layer likely hinders O2 gas permeation, impeding contact with active Pt. Photocatalytic overall water splitting proceeded using MoOx/Pt/SrTiO3 with inhibited water formation from H2 and O2, which is the prevailing back reaction on the bare Pt/SrTiO3 photocatalyst. The Mo coating was stable in acidic media for multiple hours of overall water splitting by membraneless electrolysis and photocatalysis.",

keywords = "electrocatalysis, hydrogen evolution, in operando XAS, photocatalysis, water splitting",

author = "Garcia-Esparza, \{Angel T.\} and Tatsuya Shinagawa and Samy Ould-Chikh and Muhammad Qureshi and Xuyuan Peng and Nini Wei and Anjum, \{Dalaver H.\} and Alain Clo and Weng, \{Tsu Chien\} and Dennis Nordlund and Dimosthenis Sokaras and Jun Kubota and Kazunari Domen and Kazuhiro Takanabe",

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Garcia-Esparza, AT, Shinagawa, T, Ould-Chikh, S, Qureshi, M, Peng, X, Wei, N, Anjum, DH, Clo, A, Weng, TC, Nordlund, D, Sokaras, D, Kubota, J, Domen, K & Takanabe, K 2017, 'An Oxygen-Insensitive Hydrogen Evolution Catalyst Coated by a Molybdenum-Based Layer for Overall Water Splitting', Angewandte Chemie - International Edition, vol. 56, no. 21, pp. 5780-5784. https://doi.org/10.1002/anie.201701861

TY - JOUR

T1 - An Oxygen-Insensitive Hydrogen Evolution Catalyst Coated by a Molybdenum-Based Layer for Overall Water Splitting

AU - Garcia-Esparza, Angel T.

AU - Shinagawa, Tatsuya

AU - Ould-Chikh, Samy

AU - Qureshi, Muhammad

AU - Peng, Xuyuan

AU - Wei, Nini

AU - Anjum, Dalaver H.

AU - Clo, Alain

AU - Weng, Tsu Chien

AU - Nordlund, Dennis

AU - Sokaras, Dimosthenis

AU - Kubota, Jun

AU - Domen, Kazunari

AU - Takanabe, Kazuhiro

PY - 2017/5/15

Y1 - 2017/5/15

N2 - For overall water-splitting systems, it is essential to establish O2-insensitive cathodes that allow cogeneration of H2 and O2. An acid-tolerant electrocatalyst is described, which employs a Mo-coating on a metal surface to achieve selective H2 evolution in the presence of O2. In operando X-ray absorption spectroscopy identified reduced Pt covered with an amorphous molybdenum oxyhydroxide hydrate with a local structural order composed of polyanionic trimeric units of molybdenum(IV). The Mo layer likely hinders O2 gas permeation, impeding contact with active Pt. Photocatalytic overall water splitting proceeded using MoOx/Pt/SrTiO3 with inhibited water formation from H2 and O2, which is the prevailing back reaction on the bare Pt/SrTiO3 photocatalyst. The Mo coating was stable in acidic media for multiple hours of overall water splitting by membraneless electrolysis and photocatalysis.

AB - For overall water-splitting systems, it is essential to establish O2-insensitive cathodes that allow cogeneration of H2 and O2. An acid-tolerant electrocatalyst is described, which employs a Mo-coating on a metal surface to achieve selective H2 evolution in the presence of O2. In operando X-ray absorption spectroscopy identified reduced Pt covered with an amorphous molybdenum oxyhydroxide hydrate with a local structural order composed of polyanionic trimeric units of molybdenum(IV). The Mo layer likely hinders O2 gas permeation, impeding contact with active Pt. Photocatalytic overall water splitting proceeded using MoOx/Pt/SrTiO3 with inhibited water formation from H2 and O2, which is the prevailing back reaction on the bare Pt/SrTiO3 photocatalyst. The Mo coating was stable in acidic media for multiple hours of overall water splitting by membraneless electrolysis and photocatalysis.

KW - electrocatalysis

KW - hydrogen evolution

KW - in operando XAS

KW - photocatalysis

KW - water splitting

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C2 - 28407339

AN - SCOPUS:85017422550

SN - 1433-7851

VL - 56

SP - 5780

EP - 5784

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 21

ER -

An Oxygen-Insensitive Hydrogen Evolution Catalyst Coated by a Molybdenum-Based Layer for Overall Water Splitting

Abstract

UN SDGs

Keywords

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