Zinc-Blende CdS Nanocubes with Coordinated Facets for Photocatalytic Water Splitting

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• 作者：Yangyang Zhang ; Lili Han ; Changhong Wang ; Weihua Wang ; Tao Ling ; Jing Yang ; Cunku Dong ; Feng LinXi-Wen Du
• 刊名：ACS Catalysis
• 出版年：2017
• 出版时间：February 3, 2017
• 年：2017
• 卷：7
• 期：2
• 页码：1470-1477
• 全文大小：516K
• ISSN：2155-5435

文摘

To develop catalysts that are efficient and stable under aggressive catalytic conditions, we detail a synthetic approach to producing zinc-blende cadmium sulfide (CdS) nanocubes (NCs), a metastable CdS polymorph that is terminated by coordinated facets. The hydrogen generation activity of these CdS NCs (∼11.6 mmol g^–1 h^–1) was nearly 4 times higher than that of wurtzite CdS nanoparticles (∼2.7 mmol g^–1 h^–1) and 2 times higher than that of irregularly shaped zinc-blende CdS nanoparticles (∼5.9 mmol g^–1 h^–1). Furthermore, the NCs also exhibited much improved long-term performance compared to the performance of these controlled photocatalysts. Finally, the density functional theory calculation and site-specific Au photodeposition demonstrate that the improved activity and stability can be attributed to the enhanced charge-flow steering and coordinated facet terminations.