Journal
ADVANCED ENERGY MATERIALS
Volume 10, Issue 44, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202002424
Keywords
Au nanoparticles; black phosphorus; mixed-dimensional; oxygen evolution reaction
Categories
Funding
- National Natural Science Fund Foundation of China [61 605 166]
- Scientific Research Fund of Hunan Provincial Education Department [18A059]
- Open Fund based on innovation platform of Hunan colleges and universities [18K032]
- Provincial Natural Science Foundation of Hunan [2019JJ50612]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT_17R91]
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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.
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