Nitrogen doped titania stabilized Pt/C catalyst via selective atomic layer deposition for fuel cell oxygen reduction

MOF-Derived Hollow Heterostructure MnCo2O4@Co9S8 Nanocages as a High-Performance Bifunctional Electrode for Water Electrolysis and Flexible Supercapacitor

“…64 According to eq S19, the capacitance contribution (k 1 ν) and the diffusion control contribution (k 2 ν 1/2 ) of the charge stored process are calculated. 68 At the same time, the linear relationship between peak current and scan rate is consistent with the power law equation (i = aν b ) (Figure S19), 69 the b values were determined to be 0.7043 and 0.5545, respectively, which were between 0.5 and 1 (Figure 6e), demonstrating that the MnCo 2 O 4 @Co 9 S 8 -10 electrode material was capacitancecontrolled and diffusion-controlled in electrochemical reactions. 18 Figure 6f shows a comparison of the CV curve and the capacitance contribution curve (shaded part) of MnCo 2 O 4 @ Co 9 S 8 -10 at 5 mV s −1 .…”

“…Furthermore, the hollow morphology formed by vulcanization helped to effectively prevent volume expansion and deformation during the electrochemical reaction, thus greatly improving the performance and electrochemical stability of the electrode material . Therefore, it is possible to prove that the BSH electrode has good volume characteristics, which makes it possible to realize the flexible energy storage device of the electrode material …”

Precise control of the catalyst interface at the atomic level

“…Nitrogen-doped titania also demonstrates how N doping contributes to the increased durability of Pt/C. 103 As seen in Fig. 6a and b, after 30 000 cycles, Pt/C@N-TiO 2 did not exhibit obvious sintering, and showed a narrow distribution density (Fig.…”

“…However, understanding the underlying interface interactions between Pt and oxide (including the poisoning issues seen in electrocatalysts) is important. Chen and co-workers 103 reported nitrogen-doped titania as a coating layer deposited by ALD to protect a standard Pt/C catalyst. This design helped overcome the issues of degradation of Pt nanoparticles.…”

“…(c) Size distribution before and after stability tests. (d) Initial and final mass activity of Pt/C and Pt/C@N-TiO 2 after stability tests 103. Copyright 2023, Elsevier.…”