An integrated platinum-nanocarbon electrocatalyst for efficient oxygen reduction

Abstract

Efficient and robust platinum-carbon electrocatalysts are of great significance for the long-term service of high-performance fuel cells. Here, we report a Pt alloy integrated in a cobalt-nitrogen-nanocarbon matrix by a multiscale design principle for efficient oxygen reduction reaction. This Pt integrated catalyst demonstrates an increased mass activity, 11.7 times higher than that of commercial Pt catalyst, and retains a stability of 98.7% after 30,000 potential cycles. Additionally, this integrated catalyst delivers a current density of 1.50 A cm−2 at 0.6 V in the hydrogen-air fuel cell and achieves a power density of 980 mW cm−2. Comprehensive investigations demonstrate that the synergistic contribution of components and structure in the platinum-carbon integrated catalyst is responsible for the high-efficiency ORR in fuel cells.

Rationally Designed Manganese-Based Metal–Organic Frameworks as Altruistic Metal Oxide Precursors for Noble Metal-Free Oxygen Reduction Reaction

“…The ORR activity of the derived composites is comparable to some of the platinum-based catalysts, such as the PtCo@CoNC/NTG catalyst reported by Xia and co-workers has an E 1/2 value of 0.94 V versus RHE, with a Tafel slope of 71 mV dec –1 , and the Pt/FeN4–C reported by Wu et al . has an E 1/2 value of 0.9 V versus RHE. , …”

Advances in Low Pt Loading Membrane Electrode Assembly for Proton Exchange Membrane Fuel Cells

“…Like the Pt-based material system that has been discussed, most studies of nonprecious metal-based electrocatalysts are still on RDE [ 72 ]. However, recent reports have indicated that combining nonprecious and precious metal catalysts may benefit from a synergistic effect [ 130 , 131 , 132 ]. This integrated field might be promising for enhancing ORR catalytic performance while keeping costs down.…”

Defect engineering of two-dimensional materials for advanced energy conversion and storage

“…285–288 In their intrinsic operation structures, the cathodic ORR shows more sluggish kinetics compared to the anodic hydrogen oxidation reaction (HOR), thus becoming the performance-limiting process. 289–293 Typically, the catalytic process of the ORR has two possible routes. One is the direct reduction of O 2 to water (under acidic conditions) or OH − (under alkaline conditions) with an efficient 4e − transfer process, which is more favorable in practical applications like fuel cells.…”