title: Enhanced electrocatalytic performance for oxygen reduction via active interfaces of layer-by-layered titanium nitride/titanium carbonitride structures.
abstract: Cathode materials always limit the performance of fuel cells while the commercial platinum-based catalysts hardly meet the requirements of low cost, durable and stable. Here a non-precious metal oxygen reduction reaction (ORR) electocatalyst based on titanium nitride/titanium carbonitride hierarchical structures (TNTCNHS) is demonstrated as high activity as Pt/C. In alkaline condition, tuning interface/mass ratio of TiN/TiCN, we observed the onset potential of ~0.93 V vs. RHE and a limit diffusion current density of ~5.1 mA cm(-2) (at a rotating speed of 1600 rpm) on TNTCNHS with a relative low catalyst loading of ~0.1 mg cm(-2). The kinetic current, durability and tolerance to crossover effect studies reveal even more efficient than carbon-supported platinum. The architecture fabrication for such electrocatalyst is easy to realize in industrial-scale facilities, for the use of chemical vapor deposition (CVD) technique could support a huge area production (more than 10000 cm(2) for one pot) to satisfy the enormous market requirements in the future.
authors.affiliation: Key Laboratory of Green Chemistry and Technology, Ministry of education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.
authors.forename: Zhaoyu
authors.initials: Z
authors.lastname: Jin
authors.affiliation: 1] Key Laboratory of Green Chemistry and Technology, Ministry of education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China [2] College of Architecture and Environment, Sichuan University, Chengdu 610065, P. R. China.
authors.forename: Panpan
authors.initials: P
authors.lastname: Li
authors.affiliation: Key Laboratory of Green Chemistry and Technology, Ministry of education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.
authors.forename: Dan
authors.initials: D
authors.lastname: Xiao