Department of Chemistry and ‡Department of Physics, BITS-Pilani , Pilani, Rajasthan-333031, India.
Langmuir. 2017 Apr 4;33(13):3178-3186. doi: 10.1021/acs.langmuir.7b00029. Epub 2017 Mar 23.
Different metal chalcogenides, being a potential candidate for hydrogen evolution catalysts, have attracted enormous attention in the field of water splitting. In the present study, AgS/Ag is revealed as an efficient catalyst for hydrogen evolution. When a sacrificial template of the CuS nanostructure is used, AgS/Ag heterostructures are synthesized following a simple wet-chemical technique. Two different routes, wet chemical and hydrothermal, are followed to modulate the morphology of the CuS templates from flower ball to wirelike structures, which subsequently results in the formation of AgS nanostructure. Finally, the Ag layer is deposited on AgS with the help of a photoreduction technique. The unique heterostructure of AgS/Ag shows efficient catalytic activity in the H evolution reaction. A AgS/Ag wire can successfully generate a 10 mA/cm current density at a -0.199 V potential. AgS/Ag contains the micronanostructure where nanoplates of AgS/Ag assemble to give rise to microstructures such as flower balls and wire.
不同的金属硫属化物作为析氢催化剂的潜在候选物，在水分解领域引起了极大的关注。在本研究中，AgS/Ag 被揭示为一种有效的析氢催化剂。当使用 CuS 纳米结构的牺牲模板时，AgS/Ag 异质结构可以通过简单的湿化学技术合成。通过两种不同的途径，即湿化学和水热法，将 CuS 模板的形态从花球调制到线状结构，从而形成 AgS 纳米结构。最后，在光还原技术的帮助下，Ag 层沉积在 AgS 上。AgS/Ag 的独特异质结构在 H 演化反应中表现出高效的催化活性。AgS/Ag 线可以在-0.199 V 的电位下成功地产生 10 mA/cm 的电流密度。AgS/Ag 包含微米纳米结构，其中 AgS/Ag 的纳米板组装形成花球和线等微观结构。
