Premium
Black Phosphorus Nanosheets Modified with Au Nanoparticles as High Conductivity and High Activity Electrocatalyst for Oxygen Evolution Reaction
Author(s) -
Qiao Hui,
Liu Huating,
Huang Zongyu,
Ma Qian,
Luo Siwei,
Li Jun,
Liu Yundan,
Zhong Jianxin,
Qi Xiang
Publication year - 2020
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202002424
Subject(s) - tafel equation , electrocatalyst , materials science , oxygen evolution , nanoparticle , catalysis , black phosphorus , chemical engineering , electrochemistry , oxygen , nanotechnology , chemistry , optoelectronics , electrode , engineering , biochemistry , organic chemistry
As a unique monoelemental 2D material, black phosphorus (BP) has attracted great research interest in the field of electrocatalytic oxygen release due to its special electronic structure and satisfactory catalytic activity. However, the limited catalytic activity of BP nanosheets limits its practical application. Here, a one‐pot hot solution method is used to synthesize a mixed‐dimensional hybrid of BP nanosheets loaded with Au nanoparticles (BP/Au). The electrochemical test results show the BP/Au exhibits excellent electrocatalytic oxygen evolution performance with an ultra‐low onset potential (1.36 V) and Tafel slope (68.1 mV dec −1 ). The first‐principles calculation results further support the experimental results, in which the loading of Au nanoparticles realizes the transition of BP from the semiconductor phase to the metal phase, which makes the BP/Au exhibit faster carrier mobility. The BP/Au also exhibits a Gibbs free energy closer to the optimal value of the OER. This is because Au nanoparticles can inject free electrons unto the surface of BP and realize the coupling effect between the local semiconductor and metal, thereby effectively improving the carrier mobility and catalytic activity. This work fully confirms that the BP/Au is a suitable candidate for electrocatalytic oxygen evolution, and provides effective strategies for constructing efficient electrocatalysts.