太阳能光催化分解水制氢是人类解决能源问题的一个理想途径，也是科学领域的一个重大课题。光催化分解水反应体系非常复杂，需解决一系列相关的科学问题和技术难题才有可能发展出高效光催化分解水体系。其中，助催化剂就是一个关键的因素。然而，目前光催化分解水体系中产氢助催化剂主要是由贵金属构成。贵金属在有效提高光催化产氢效率的同时也导致光催化剂成本的高昂。本课题集中对具有类贵金属性质的Mo基W基化合物（氮化物、碳化物、磷化物）作为光催化分解水制氢体系中的助催化剂进行研究用以取代贵金属助催化剂。研究助催化剂的合成方法、光催化剂的组装方法、助催化剂和主体光催化剂（例如TiO2、CdS、TaON、(Ga1-xZnx)(N1-xOx)等）结构的匹配关系等对光催化分解水制氢活性的影响，以期获得性能优异、价格低廉、环境友好、可以替代贵金属的非贵金属助催化剂，为未来光催化分解水制氢工业化提供科学依据和实验基础。

Using solar energy for photocatalytic H2 evolution is an ideal way to resolve the energy problems and also an important question for discussion in science. The photocatalytic water splitting systems are very complex. It needs to resolve a series of questions in science and technology for obtaining the efficient photocatalytic water splitting system, among which the selection of co-catalyst is a crucial problem. However, the co-catalysts for H2 evolution in the photocatalytic water splitting are mainly noble metals at present. Noble metal co-catalysts result in high cost of photocatalysts with improving the photocatalytic efficiency. This item focuses on the compounds based on Mo and W (nitrides, carbides, phosphides) which in some degree have the noble metal features, as the co-catalysts substituted for the noble metals in photocatalytic water splitting for H2 evolution. It mainly researches the effects of synthesis methods of co-catalysts, assembling methods of photocatalysts, structure matching of co-catalysts and main catalysts (such as: TiO2, CdS, TaON, (Ga1-xZnx)(N1-xOx)) on the photocatalytic activities of water splitting for H2 evolution. It is anticipated to obtain non-metal co-catalysts instead of noble metal co-catalysts with high quality, low cost, environment friendly. This item can provide scientific basis and experiment foundation for the industrialization of photocatalytic water splitting for H2 evolution in the future.