Abstract
Constructing self-standing all-metal mesoporous electrodes is very important for energy storage and energy conversion. Herein, we report the in situ fabrication of a continuous mesoporous PtPd film on macroporous Ni foam (mPtPd-NF) by a very simple and efficient soaking method. The mPtPd-NF shows enhanced catalytic activity and high durability for oxygen reduction reaction, benefiting from its self-standing all-metal mesoporous structure and bimetallic compositions. The mPtPd-NF, as a binder-free cathode for Zn–air batteries (ZABs), exhibits superior battery performance. The proposed approach is truly facile for directly fabricating mesoporous metal film on the metal substrate, compared with previous complex methods (i.e., dealloying or template methods). This newly developed one-step method is very powerful for constructing mesoporous all-metal materials with controllable compositions and desired performances on a large scale for various electrocatalytic applications.
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