Das Anirban, Ganguli Ashok Kumar
Department of Chemistry, Indian Institute of Technology Hauz Khas New Delhi 110016 India
RSC Adv. 2018 Jul 12;8(44):25065-25078. doi: 10.1039/c8ra04133d. eCollection 2018 Jul 9.
Hydrothermal and microemulsion methods are low temperature methods used to obtain nanostructures of definite morphologies, sizes, facet termination and other structural features which result in the corresponding unique response to chemical, electrochemical or photochemical stimuli. An efficient catalyst to electrochemically split water to produce hydrogen and oxygen is of scientific, economic and societal relevance, especially due to the abundance of the starting material, water, and due to the product hydrogen, which is an ideal fuel, due to its highest mass density and clean combustion in air. In this review we focus on the hydrogen evolution reaction, HER, and the oxygen evolution reaction, OER, activity of the electrocatalysts produced by hydrothermal or microemulsion methods. The variation in electrochemical response resulting from the unique shape, composition and nano-architecture is discussed. Broadly, the catalysts were categorized as binary and ternary metal alloys as well as metal chalcogenides and oxides. This compilation would aid in the design of more effective water splitting electrocatalysts as well as in the selection of appropriate candidates for advanced mechanistic studies.
水热法和微乳液法是用于获得具有确定形态、尺寸、晶面终止和其他结构特征的纳米结构的低温方法，这些特征会导致对化学、电化学或光化学刺激产生相应的独特响应。一种能将水电解为氢气和氧气的高效催化剂具有科学、经济和社会意义，特别是因为起始原料水储量丰富，且产物氢气是一种理想燃料，因其具有最高的质量密度且在空气中燃烧清洁。在本综述中，我们重点关注水热法或微乳液法制备的电催化剂的析氢反应（HER）和析氧反应（OER）活性。讨论了由独特形状、组成和纳米结构导致的电化学响应变化。大致上，催化剂被分类为二元和三元金属合金以及金属硫族化物和氧化物。这一汇编将有助于设计更有效的水电解电催化剂，并有助于选择合适的候选物进行深入的机理研究。
