In-situ construction of three-dimensional ordered cobalt-nitrogen-carbon nanotubes integrated self-supporting electrode for efficiently electrocatalyzing oxygen reduction reaction
Developing low-cost non-precious metal catalysts(NPMC)to replace Pt-based catalysts and ration-ally designing their integrated electrode to efficiently electrocatalyze oxygen reduction reaction(ORR)are greatly significant for facilitating the commercialization of fuel cells.Here,we report a novel self-supporting three-dimensional(3D)ordered integrated ORR electrode by a simple chemi-cal vapor deposition(CVD)approach to in-situ grow Co,N co-doped carbon nanotubes(N-CNTs@Co)onto carbon paper modified by oxygen-containing functional groups(OCP).Benefit-ing from the moderate density of CNTs and abundant pyridinic N and graphitic N configurations as ORR active sites,the best-performing sample(N-CNTs-20@Co/OCP)exhibits outstanding ORR performance in both basic(0.1 mol L-1 KOH)and acidic(0.1 mol L-1 HCIO4)media,which is compa-rable to the one fabricated through the conventional method by spraying commercial Pt/C(20 wt％)onto OCP substrate(0.2 mg Pt cm-2).This work can provide a feasible solution for the in-situ construction of efficient NPMC-based ORR integrated electrode.
NETL
NSTL
万方数据
