Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 44, Pages 38419-38427Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b10016
Keywords
hydrogen evolution reaction; PdMnCo alloy; interfacial effect; pyridinic nitrogen-doped carbon; hybrid structures
Funding
- National Natural Science Foundation (NSFC) [51772283, 21271163, U1232211]
- CAS/SAFEA
- Hefei Science Center CAS [2016HSC-IU011]
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The catalytic performance of Pd-based catalysts has long been hindered by surface contamination, particle agglomeration, and lack of rational structural design. Here we report a simple adsorption method for rapid synthesis (similar to 90 s) of structure optimized Pd alloy supported on nitrogen-doped carbon without the use of surfactants or extra reducing, agents. The material shows much,lower overpotential than 30 wt % Pd/C and 40 wt % Pt/C catalysts while exhibiting excellent durability (80 h). Moreover, unveiled by the density functional theory (DFT) calculation results, the underlying reason for the outstanding performance is that the PdMnCo alloy/pyridinic nitrogen-doped carbon interfaces weaken the hydrogen-adsorption energy on the catalyst and thus optimize the Gibbs free energy of the intermediate state (Delta G(H*), leading to a remarkable electrocatalytic activity. This work also opens up an avenue for quick synthesis of a highly efficient structure-optimized Pd-based catalyst.
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