期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 21, 页码 24814-24823出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c04386
关键词
photoassisted electrocatalysis; metal-free PANI/CDs; water splitting; neutral electrolyte; charge-transfer dynamics
资金
- National Key R&D Program of China [2020YFA0406104]
- National MCF Energy R&D Program of China [2018YFE0306105]
- Innovative Research Group Project of the National Natural Science Foundation of China [51821002]
- National Natural Science Foundation of China [51725204, 21771132, 51972216, 52041202]
- Natural Science Foundation of Jiangsu Province [BK20190041]
- Key-Area Research and Development Program of Guangdong Province [2019B010933001]
- Collaborative Innovation Center of Suzhou Nano Science Technology
- 111 Project
A metal-free bifunctional photoassisted catalyst of a polyaniline/carbon dots composite was used for overall water splitting, achieving improved electrocatalytic performance under visible light conditions.
Photoassisted electrocatalytic (P-EC) water splitting for H-2 production has received much attention. Here, we report a metal-free bifunctional photoassisted catalyst of a polyaniline/carbon dots (PANI/CDs) composite for overall water splitting. In a neutral electrolyte, under visible light, the overpotentials of the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) for PANI/CDs/NF are reduced by 150 and 65 mV to reach the current densities of 30 and 20 mA cm(-2), respectively. In a full water-splitting cell, under visible light, the current density is 13.27 mA cm(-2) at 2.0 V, which increases by 62.8% compared with that under the dark conditions (8.15 mA cm(-2)). The in situ transient photovoltage (TPV) tests were used to study the light-induced effects on half-reactions of water splitting, as well as the charge-transfer kinetic characteristics at the catalyst interface.
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