Channel-Rich RuCu Nanosheets for pH-Universal Overall Water Splitting Electrocatalysis

Qing Yao; Bolong Huang; Nan Zhang; Mingzi Sun; Qi Shao; Xiaoqing Huang

doi:10.1002/anie.201908092

Channel-Rich RuCu Nanosheets for pH-Universal Overall Water Splitting Electrocatalysis

Qing Yao, Bolong Huang, Nan Zhang, Mingzi Sun, Qi Shao, Xiaoqing Huang

Research output: Journal article publication › Journal article › Academic research › peer-review

321 Citations (Scopus)

Abstract

Channel-rich RuCu snowflake-like nanosheets (NSs) composed of crystallized Ru and amorphous Cu were used as efficient electrocatalysts for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting in pH-universal electrolytes. The optimized RuCu NSs/C-350 °C and RuCu NSs/C-250 °C show attractive activities of OER and HER with low overpotentials and small Tafel slopes, respectively. When applied to overall water splitting, the optimized RuCu NSs/C can reach 10 mA cm⁻² at cell voltages of only 1.49, 1.55, 1.49 and 1.50 V in 1 m KOH, 0.1 m KOH, 0.5 m H₂SO₄ and 0.05 m H₂SO₄, respectively, much lower than those of commercial Ir/C∥Pt/C. The optimized electrolyzer exhibits superior durability with small potential change after up to 45 h in 1 m KOH, showing a class of efficient functional electrocatalysts for overall water splitting.

Original language	English
Pages (from-to)	13983-13988
Number of pages	6
Journal	Angewandte Chemie - International Edition
Volume	58
Issue number	39
DOIs	https://doi.org/10.1002/anie.201908092
Publication status	Published - 23 Sept 2019

Keywords

channels
electrocatalysis
nanosheets
overall water splitting
ruthenium

ASJC Scopus subject areas

Catalysis
General Chemistry

UN SDGs

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

More information

10.1002/anie.201908092

http://hdl.handle.net/10397/101512

Cite this

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title = "Channel-Rich RuCu Nanosheets for pH-Universal Overall Water Splitting Electrocatalysis",

abstract = "Channel-rich RuCu snowflake-like nanosheets (NSs) composed of crystallized Ru and amorphous Cu were used as efficient electrocatalysts for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting in pH-universal electrolytes. The optimized RuCu NSs/C-350 °C and RuCu NSs/C-250 °C show attractive activities of OER and HER with low overpotentials and small Tafel slopes, respectively. When applied to overall water splitting, the optimized RuCu NSs/C can reach 10 mA cm−2 at cell voltages of only 1.49, 1.55, 1.49 and 1.50 V in 1 m KOH, 0.1 m KOH, 0.5 m H2SO4 and 0.05 m H2SO4, respectively, much lower than those of commercial Ir/C∥Pt/C. The optimized electrolyzer exhibits superior durability with small potential change after up to 45 h in 1 m KOH, showing a class of efficient functional electrocatalysts for overall water splitting.",

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author = "Qing Yao and Bolong Huang and Nan Zhang and Mingzi Sun and Qi Shao and Xiaoqing Huang",

year = "2019",

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doi = "10.1002/anie.201908092",

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AU - Yao, Qing

AU - Huang, Bolong

AU - Zhang, Nan

AU - Sun, Mingzi

AU - Shao, Qi

AU - Huang, Xiaoqing

PY - 2019/9/23

Y1 - 2019/9/23

N2 - Channel-rich RuCu snowflake-like nanosheets (NSs) composed of crystallized Ru and amorphous Cu were used as efficient electrocatalysts for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting in pH-universal electrolytes. The optimized RuCu NSs/C-350 °C and RuCu NSs/C-250 °C show attractive activities of OER and HER with low overpotentials and small Tafel slopes, respectively. When applied to overall water splitting, the optimized RuCu NSs/C can reach 10 mA cm−2 at cell voltages of only 1.49, 1.55, 1.49 and 1.50 V in 1 m KOH, 0.1 m KOH, 0.5 m H2SO4 and 0.05 m H2SO4, respectively, much lower than those of commercial Ir/C∥Pt/C. The optimized electrolyzer exhibits superior durability with small potential change after up to 45 h in 1 m KOH, showing a class of efficient functional electrocatalysts for overall water splitting.

AB - Channel-rich RuCu snowflake-like nanosheets (NSs) composed of crystallized Ru and amorphous Cu were used as efficient electrocatalysts for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting in pH-universal electrolytes. The optimized RuCu NSs/C-350 °C and RuCu NSs/C-250 °C show attractive activities of OER and HER with low overpotentials and small Tafel slopes, respectively. When applied to overall water splitting, the optimized RuCu NSs/C can reach 10 mA cm−2 at cell voltages of only 1.49, 1.55, 1.49 and 1.50 V in 1 m KOH, 0.1 m KOH, 0.5 m H2SO4 and 0.05 m H2SO4, respectively, much lower than those of commercial Ir/C∥Pt/C. The optimized electrolyzer exhibits superior durability with small potential change after up to 45 h in 1 m KOH, showing a class of efficient functional electrocatalysts for overall water splitting.

KW - channels

KW - electrocatalysis

KW - nanosheets

KW - overall water splitting

KW - ruthenium

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U2 - 10.1002/anie.201908092

DO - 10.1002/anie.201908092

M3 - Journal article

C2 - 31342633

AN - SCOPUS:85071152295

SN - 1433-7851

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SP - 13983

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JO - Angewandte Chemie - International Edition

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IS - 39

ER -

Channel-Rich RuCu Nanosheets for pH-Universal Overall Water Splitting Electrocatalysis

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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