P-n tungsten oxide homojunctions for Vis-NIR light-enhanced electrocatalytic hydrogen evolution

Bin Chang; Zizheng Ai; Dong Shi; Yueyao Zhong; Kang Zhang; Yongliang Shao; Lei Zhang; Jianxing Shen; Yongzhong Wu; Xiaopeng Hao

doi:10.1039/c9ta06589j

P-n tungsten oxide homojunctions for Vis-NIR light-enhanced electrocatalytic hydrogen evolution

Bin Chang, Zizheng Ai, Dong Shi, Yueyao Zhong, Kang Zhang, Yongliang Shao, Lei Zhang, Jianxing Shen, Yongzhong Wu^*, Xiaopeng Hao

^*Corresponding author for this work

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

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Abstract

Based on energy band engineering theory, a p-n homojunction of metal oxides was designed to overcome the recombination of photogenerated carriers and inappropriate hydrogen adsorption energy. A novel p-n tungsten oxide homojunction was successfully synthesized by tuning oxygen vacancies and phosphorus-doping. Based on the synergies of Mxenes, a Vis-NIR light-enhanced electrocatalytic hydrogen evolution system was accomplished with a small overpotential of 44 mV (at 10 mA cm^-2) and a low Tafel slope of 41 mV dec^-1, which performed much more efficiently than in darkness and comparably to noble-metal catalysts (Pt and Pt/C). Moreover, the as-synthesized samples offered a distinct advantage of long-term stability for more than 24 h both with and without light irradiation. The design philosophy of p-n homojunctions opens a prospect of utilizing light-activated metal oxides to integrate catalysis with solar energy and electrical energy.

Original language	English (US)
Pages (from-to)	19573-19580
Number of pages	8
Journal	JOURNAL OF MATERIALS CHEMISTRY A
Volume	7
Issue number	33
DOIs	https://doi.org/10.1039/c9ta06589j
State	Published - 2019

ASJC Scopus subject areas

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

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

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title = "P-n tungsten oxide homojunctions for Vis-NIR light-enhanced electrocatalytic hydrogen evolution",

abstract = "Based on energy band engineering theory, a p-n homojunction of metal oxides was designed to overcome the recombination of photogenerated carriers and inappropriate hydrogen adsorption energy. A novel p-n tungsten oxide homojunction was successfully synthesized by tuning oxygen vacancies and phosphorus-doping. Based on the synergies of Mxenes, a Vis-NIR light-enhanced electrocatalytic hydrogen evolution system was accomplished with a small overpotential of 44 mV (at 10 mA cm-2) and a low Tafel slope of 41 mV dec-1, which performed much more efficiently than in darkness and comparably to noble-metal catalysts (Pt and Pt/C). Moreover, the as-synthesized samples offered a distinct advantage of long-term stability for more than 24 h both with and without light irradiation. The design philosophy of p-n homojunctions opens a prospect of utilizing light-activated metal oxides to integrate catalysis with solar energy and electrical energy.",

author = "Bin Chang and Zizheng Ai and Dong Shi and Yueyao Zhong and Kang Zhang and Yongliang Shao and Lei Zhang and Jianxing Shen and Yongzhong Wu and Xiaopeng Hao",

note = "Funding Information: This work is supported by the National Natural Science Foundation of China (Contract No. 51872162), the Major Basic Program of the Natural Science Foundation of Shandong Province (Contract ZR2017ZB0317, ZR2018MEM013) and the Scientific Problem Tackling of Shandong Province (Contract No. 2016GGX102008). Funding Information: This work is supported by the National Natural Science Foundation of China (Contract No. 51872162), the Major Basic Program of the Natural Science Foundation of Shandong Province (Contract ZR2017ZB0317, ZR2018MEM013) and the Scientic Problem Tackling of Shandong Province (Contract No. 2016GGX102008). Publisher Copyright: {\textcopyright} 2019 The Royal Society of Chemistry.",

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language = "English (US)",

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T1 - P-n tungsten oxide homojunctions for Vis-NIR light-enhanced electrocatalytic hydrogen evolution

AU - Chang, Bin

AU - Ai, Zizheng

AU - Shi, Dong

AU - Zhong, Yueyao

AU - Zhang, Kang

AU - Shao, Yongliang

AU - Zhang, Lei

AU - Shen, Jianxing

AU - Wu, Yongzhong

AU - Hao, Xiaopeng

N1 - Funding Information: This work is supported by the National Natural Science Foundation of China (Contract No. 51872162), the Major Basic Program of the Natural Science Foundation of Shandong Province (Contract ZR2017ZB0317, ZR2018MEM013) and the Scientific Problem Tackling of Shandong Province (Contract No. 2016GGX102008). Funding Information: This work is supported by the National Natural Science Foundation of China (Contract No. 51872162), the Major Basic Program of the Natural Science Foundation of Shandong Province (Contract ZR2017ZB0317, ZR2018MEM013) and the Scientic Problem Tackling of Shandong Province (Contract No. 2016GGX102008). Publisher Copyright: © 2019 The Royal Society of Chemistry.

PY - 2019

Y1 - 2019

N2 - Based on energy band engineering theory, a p-n homojunction of metal oxides was designed to overcome the recombination of photogenerated carriers and inappropriate hydrogen adsorption energy. A novel p-n tungsten oxide homojunction was successfully synthesized by tuning oxygen vacancies and phosphorus-doping. Based on the synergies of Mxenes, a Vis-NIR light-enhanced electrocatalytic hydrogen evolution system was accomplished with a small overpotential of 44 mV (at 10 mA cm-2) and a low Tafel slope of 41 mV dec-1, which performed much more efficiently than in darkness and comparably to noble-metal catalysts (Pt and Pt/C). Moreover, the as-synthesized samples offered a distinct advantage of long-term stability for more than 24 h both with and without light irradiation. The design philosophy of p-n homojunctions opens a prospect of utilizing light-activated metal oxides to integrate catalysis with solar energy and electrical energy.

AB - Based on energy band engineering theory, a p-n homojunction of metal oxides was designed to overcome the recombination of photogenerated carriers and inappropriate hydrogen adsorption energy. A novel p-n tungsten oxide homojunction was successfully synthesized by tuning oxygen vacancies and phosphorus-doping. Based on the synergies of Mxenes, a Vis-NIR light-enhanced electrocatalytic hydrogen evolution system was accomplished with a small overpotential of 44 mV (at 10 mA cm-2) and a low Tafel slope of 41 mV dec-1, which performed much more efficiently than in darkness and comparably to noble-metal catalysts (Pt and Pt/C). Moreover, the as-synthesized samples offered a distinct advantage of long-term stability for more than 24 h both with and without light irradiation. The design philosophy of p-n homojunctions opens a prospect of utilizing light-activated metal oxides to integrate catalysis with solar energy and electrical energy.

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P-n tungsten oxide homojunctions for Vis-NIR light-enhanced electrocatalytic hydrogen evolution

Abstract

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