Dataset Information


Synergistic Pt-WO3 Dual Active Sites to Boost Hydrogen Production from Ammonia Borane.

ABSTRACT: Development of synergistic heterogeneous catalysts with active sites working cooperatively has been a pursuit of chemists. Herein, we report for the first time the fabrication and manipulation of Pt-WO3 dual-active-sites to boost hydrogen generation from ammonia borane. A combination of DFT calculations, structural characterization, and kinetic (isotopic) analysis reveals that Pt and WO3 act as the active sites for ammonia borane and H2O activation, respectively. A trade-off between the promoting effect of WO3 and the negative effect of decreased Pt binding energy contributes to a volcano-shaped activity, and Pt/CNT-5W delivers a 4-fold increased activity of 710.1 molH2·molPt-1·min-1. Moreover, WO3 is suggested to simultaneously act as the sacrificial site that can divert B-containing by-products away from Pt sites against deactivation, yielding an increase from 24% to 68% of the initial activity after five cycles. The strategy demonstrated here could shed a new light on the design and manipulation of dual-active-site catalysts.


PROVIDER: S-EPMC7052519 | BioStudies | 2020-01-01

REPOSITORIES: biostudies

Similar Datasets

1000-01-01 | S-EPMC5715161 | BioStudies
2018-01-01 | S-EPMC6641281 | BioStudies
1000-01-01 | S-EPMC5299936 | BioStudies
1000-01-01 | S-EPMC5977294 | BioStudies
2020-01-01 | S-EPMC7558311 | BioStudies
2019-01-01 | S-EPMC6473973 | BioStudies
1000-01-01 | S-EPMC5532536 | BioStudies
1000-01-01 | S-EPMC6359025 | BioStudies
1000-01-01 | S-EPMC5491959 | BioStudies
2019-01-01 | S-EPMC6756545 | BioStudies