https://scholars.lib.ntu.edu.tw/handle/123456789/632815
Title: | Bifunctional Monolayer WSe2/Graphene Self-Stitching Heterojunction Microreactors for Efficient Overall Water Splitting in Neutral Medium | Authors: | Chiang, Chun Hao Yang, Yueh Chiang Lin, Jia Wei Lin, Yung Chang Chen, Po Tuan Dong, Chung Li Lin, Hung Min Chan, Kwun Man Kao, Yu Ting Suenaga, Kazu Chiu, Po Wen CHUN-WEI CHEN |
Keywords: | atomic engineering | bifunctional catalysts | bipolar transport | microreactors | neutral water splitting | Issue Date: | 22-Nov-2022 | Publisher: | AMER CHEMICAL SOC | Journal Volume: | 16 | Journal Issue: | 11 | Start page/Pages: | 18274 | Source: | ACS Nano | Abstract: | Developing efficient bifunctional electrocatalysts in neutral media to avoid the deterioration of electrodes or catalysts under harsh environments has become the ultimate goal in electrochemical water splitting. This work demonstrates the fabrication of an on-chip bifunctional two-dimensional (2D) monolayer (ML) WSe2/graphene heterojunction microreactor for efficient overall water splitting in a neutral medium (pH = 7). Through the synergistic atomic growth of the metallic Cr dopant and graphene stitching contact on the 2D ML WSe2, the bifunctional WSe2/graphene heterojunction microreactor consisting of a full-cell configuration demonstrates excellent performance for overall water splitting in a neutral medium. Atomic doping of metallic Cr atoms onto the 2D ML WSe2effectively facilitates the charge transfer at the solid-liquid interface. In addition, the direct growth of the self-stitching graphene contact with the 2D WSe2catalyst largely reduces the contact resistance of the microreactor and further improves the overall water splitting efficiency. A significant reduction of the overpotential of nearly 1000 mV at 10 mA cm-2at the Cr-doped WSe2/graphene heterojunction microreactor compared to the ML pristine WSe2counterpart is achieved. The bifunctional WSe2/graphene self-stitching heterojunction microreactor is an ideal platform to investigate the fundamental mechanism of emerging bifunctional 2D catalysts for overall water splitting in a neutral medium. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/632815 | ISSN: | 19360851 | DOI: | 10.1021/acsnano.2c05986 |
Appears in Collections: | 材料科學與工程學系 |
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