Noble metal single atom or cluster-porous molybdenum carbide/carbon nanocomposite using dynamic arrangement of noble metal atoms, method for manufacturing same, catalyst for hydrogen evolution reaction or hydrogen oxidation reaction comprising same, and electrode comprising the catalyst

A method for preparing a noble metal single atom or cluster-porous molybdenum carbide/carbon nanocomposite, comprising:

• (a) preparing a mixture solution wherein an amphiphilic block copolymer, a molybdenum precursor, a carbon precursor, an organic polymer and a noble metal catalyst precursor are mixed in a solvent;
• (b) preparing a composite wherein the molybdenum precursor, the carbon precursor, the organic polymer and the noble metal catalyst precursor are dispersed in a hydrophilic polymer of the amphiphilic block copolymer through evaporation-induced self-assembly (EISA) by removing the solvent from the mixture solution;
• (c) preparing a composite wherein a noble metal catalyst is dispersed in a porous molybdenum carbide/carbon composite support as the amphiphilic block copolymer is removed and mesopores are formed by heat-treating the composite of (b) firstly under inert gas atmosphere;
• (d) controlling the valence electronic structure of molybdenum carbide by heat-treating the firstly heat-treated composite secondly under atmosphere of a mixture of inert gas and oxygen gas;
• and
• (e) preparing a noble metal single atom or cluster-porous molybdenum carbide/carbon nanocomposite wherein the noble metal catalyst is redispersed and bonded on the porous molybdenum carbide/carbon composite support in the form of single atoms, clusters or a mixture thereof by heat-treating the secondly heat-treated composite thirdly under inert gas atmosphere,
• wherein the noble metal catalyst is selectively bonded on molybdenum carbide nanoparticles of the noble metal single atom or cluster-porous molybdenum carbide/carbon nanocomposite as it is dynamically arranged in atomic scale.

A method for preparing a noble metal single atom or cluster-porous molybdenum carbide/carbon nanocomposite, comprising:

• (a) preparing a mixture solution wherein an amphiphilic block copolymer, a molybdenum precursor, a carbon precursor and an organic polymer are mixed in a solvent;
• (b) preparing a composite wherein the molybdenum precursor, the carbon precursor and the organic polymer are dispersed in a hydrophilic polymer of the amphiphilic block copolymer through evaporation-induced self-assembly (EISA) by removing the solvent from the mixture solution;
• (c) preparing a porous molybdenum carbide/carbon composite support as the amphiphilic block copolymer is removed and mesopores are formed by heat-treating the composite of (b) firstly under inert gas atmosphere;
• (d) controlling the valence electronic structure of molybdenum carbide by heat-treating the firstly heat-treated porous molybdenum carbide/carbon composite support secondly under atmosphere of a mixture of inert gas and oxygen gas;
• and
• (e) dispersing a noble metal catalyst precursor solution in a dispersion comprising the secondly heat-treated porous molybdenum carbide/carbon composite support and then supporting the noble metal catalyst precursor on the porous molybdenum carbide/carbon composite support by wet impregnation;
• and
• (f) preparing a noble metal single atom or cluster-porous molybdenum carbide/carbon nanocomposite wherein the noble metal catalyst is redispersed and bonded on the porous molybdenum carbide/carbon composite support in the form of single atoms, clusters or a mixture thereof by heat-treating the porous molybdenum carbide/carbon composite support on which the noble metal catalyst precursor is supported thirdly,
• wherein, in (f), the noble metal catalyst is selectively bonded on molybdenum carbide nanoparticles of the porous molybdenum carbide/carbon nanocomposite as it is dynamically arranged in atomic scale.