Designing Hierarchical Porous Amorphous MoC_x Nanoflowers for Efficient Electrocatalysis

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Transition metal carbides (TMCs) show great potential for catalysis.
• Controlling TMC crystalline phase and pore structure is key for catalytic performance but remains challenging.

Purpose of the Study:

• To develop a novel synthesis strategy for amorphous molybdenum carbide (a-MoCx) with controlled hierarchical pore structure.
• To investigate the application of this material as a support for platinum nanoparticles in zinc-air energy devices.

Main Methods:

• A self-sacrificial template strategy was employed to synthesize nanoflower-like amorphous molybdenum carbide (NF a-MoCx).
• The synthesized NF a-MoCx was used as a support for dispersing platinum nanoparticles.
• The performance of the resulting material in zinc-air energy devices was evaluated.

Main Results:

• The synthesis yielded nanoflower-like amorphous molybdenum carbide (NF a-MoCx) with a hierarchical micro/mesoporous structure.
• This structure provided a large surface area and facilitated efficient mass transport.
• Platinum nanoparticles (2 nm) were uniformly dispersed on the NF a-MoCx support, achieving a power density of 117.67 mW cm⁻² in Zn-air devices.

Conclusions:

• The self-sacrificial template strategy is effective for creating architecturally controlled amorphous molybdenum carbide.
• NF a-MoCx serves as an excellent support for platinum nanoparticles, enhancing catalytic activity and device performance.
• This work offers a promising pathway for developing advanced catalysts for energy applications.