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 M. 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 M. Clo, Tsu-Chien Weng, Dennis Nordlund, Dimosthenis Sokaras, Jun Kubota, Kazunari Domen, Kazuhiro Takanabe

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

108 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 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.

Original language	English (US)
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 https://doi.org/10.1002/ange.201701861
State	Published - Apr 13 2017

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). Pavel Afanasiev is kindly acknowledged for sharing reference spectra recorded at the Mo K-edge. Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515.

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Garcia Esparza, A. T., Shinagawa, T., Ould-Chikh, S., Qureshi, M., Peng, X., Wei, N., Anjum, D. H., Clo, A. M., 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, https://doi.org/10.1002/ange.201701861

@article{eb9c5184dc324977a21db303f3e68ea2,

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.",

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 Clo, {Alain M.} and Tsu-Chien Weng and Dennis Nordlund and Dimosthenis Sokaras and Jun Kubota and Kazunari Domen and Kazuhiro Takanabe",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). Pavel Afanasiev is kindly acknowledged for sharing reference spectra recorded at the Mo K-edge. Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515.",

year = "2017",

month = apr,

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doi = "10.1002/anie.201701861",

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Garcia Esparza, AT, Shinagawa, T, Ould-Chikh, S, Qureshi, M, Peng, X, Wei, N, Anjum, DH, Clo, AM, 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, vol. 56, no. 21, pp. 5780-5784. https://doi.org/10.1002/anie.201701861, https://doi.org/10.1002/ange.201701861

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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 M.

AU - Weng, Tsu-Chien

AU - Nordlund, Dennis

AU - Sokaras, Dimosthenis

AU - Kubota, Jun

AU - Domen, Kazunari

AU - Takanabe, Kazuhiro

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). Pavel Afanasiev is kindly acknowledged for sharing reference spectra recorded at the Mo K-edge. Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515.

PY - 2017/4/13

Y1 - 2017/4/13

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.

UR - http://hdl.handle.net/10754/623790

UR - http://onlinelibrary.wiley.com/doi/10.1002/anie.201701861/full

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U2 - 10.1002/anie.201701861

DO - 10.1002/anie.201701861

M3 - Article

C2 - 28407339

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

Bibliographical note

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