TY - JOUR
T1 - Multiscale structural optimization
T2 - Highly efficient hollow iron-doped metal sulfide heterostructures as bifunctional electrocatalysts for water splitting
AU - Guo, Yanna
AU - Zhou, Xin
AU - Tang, Jing
AU - Tanaka, Shunsuke
AU - Kaneti, Yusuf Valentino
AU - Na, Jongbeom
AU - Jiang, Bo
AU - Yamauchi, Yusuke
AU - Bando, Yoshio
AU - Sugahara, Yoshiyuki
N1 - Funding Information:
Bo Jiang received his Ph.D. degree (2017) under the supervision of Prof. Yamauchi Yusuke in Waseda University, Japan. Then, he worked as a postdoctoral fellow with Prof. Yamauchi Yusuke at National Institute for Materials Science (NIMS), Japan. Now he is a JSPS Postdoctoral Fellowship at NIMS. His research interests mainly focus on nanostructured metal-based catalysts for electro-catalysis including fuel cell, water splitting and CO 2 reduction.
Funding Information:
J.T. and Y.Y. are the recipients of Discovery Early Career Researcher Award ( DE190101410 ) and Future Fellow ( FT150100479 ), respectively, funded by the Australian Research Council (ARC) . This work was partly performed at the Queensland node of the Australian National Fabrication Facility (ANFF), a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australian researchers.
Funding Information:
J.T. and Y.Y. are the recipients of Discovery Early Career Researcher Award (DE190101410) and Future Fellow (FT150100479), respectively, funded by the Australian Research Council (ARC). This work was partly performed at the Queensland node of the Australian National Fabrication Facility (ANFF), a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australian researchers.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/9
Y1 - 2020/9
N2 - Hollow iron-doped Co–Mo sulfide (H–Fe–CoMoS) heterostructures with a highly efficient water-splitting catalytic ability were achieved by applying a multiscale optimization strategy. Morphological and compositional optimization on a macroscale achieved by assembling a bimetallic Co–Mo sulfide (CoMoS) heterostructure in a hollow-structured composite (H–CoMoS) gave the electrocatalyst an ability to conduct enhanced bifunctional activities for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Intrinsic electronic structure optimization on a microscale achieved by introducing a small amount of iron (Fe) into H–CoMoS (H–Fe–CoMoS) further improved its catalytic activity and stability. Electrochemical measurements revealed that this multiscale structural optimization promoted enhanced electrical conductivity and increased the number of electrochemical active sites on the H–Fe–CoMoS, leading to its remarkable electrocatalytic performance as a bifunctional catalyst for both HER and OER in alkaline media. The H–Fe–CoMoS showed overpotentials of 282 mV and 137 mV to achieve a current density of 10 mA cm−2 for OER and HER, respectively, which are comparable to the performance of the benchmark OER catalyst RuO2 and HER catalyst Pt/C.
AB - Hollow iron-doped Co–Mo sulfide (H–Fe–CoMoS) heterostructures with a highly efficient water-splitting catalytic ability were achieved by applying a multiscale optimization strategy. Morphological and compositional optimization on a macroscale achieved by assembling a bimetallic Co–Mo sulfide (CoMoS) heterostructure in a hollow-structured composite (H–CoMoS) gave the electrocatalyst an ability to conduct enhanced bifunctional activities for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Intrinsic electronic structure optimization on a microscale achieved by introducing a small amount of iron (Fe) into H–CoMoS (H–Fe–CoMoS) further improved its catalytic activity and stability. Electrochemical measurements revealed that this multiscale structural optimization promoted enhanced electrical conductivity and increased the number of electrochemical active sites on the H–Fe–CoMoS, leading to its remarkable electrocatalytic performance as a bifunctional catalyst for both HER and OER in alkaline media. The H–Fe–CoMoS showed overpotentials of 282 mV and 137 mV to achieve a current density of 10 mA cm−2 for OER and HER, respectively, which are comparable to the performance of the benchmark OER catalyst RuO2 and HER catalyst Pt/C.
KW - CoMoS heterostructure
KW - Electrochemical water splitting
KW - Fe-doping
KW - Multiscale optimization
KW - Nanosized hollow structure
KW - Soft-template
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U2 - 10.1016/j.nanoen.2020.104913
DO - 10.1016/j.nanoen.2020.104913
M3 - Article
AN - SCOPUS:85085659739
SN - 2211-2855
VL - 75
JO - Nano Energy
JF - Nano Energy
M1 - 104913
ER -
