Stratified nanoporous PtTi alloys for hydrolysis of ammonia borane

摘要: Abstract Stratified nanoporous PtTi (SNP-PtTi) alloys with bimodal size distributions and different components are successfully prepared by selectively dissolving Al atoms followed removing part of Ti from the PtTiAl precursor alloy. The as-made have stratified architecture first order ligaments around 50 nm second smaller 6 nm. SNP-PtTi bimetallic ratios exhibit much higher catalytic activity for hydrolysis ammonia borane than NP-Pt catalyst. SNP-Pt 65 35 alloy shows superior specific toward hydrolytic dehydrogenation compared 50 -Pt 80 20 , showing an initial turnover frequency 51.4 mol H 2 (mol Pt) −1  min . activation energy was estimated to be about 39.4 kJ mol which small most reported values in literature. In addition, recyclability tests indicate that retained 63% after fifth run hydrolysis. lifetime measured as 16,380 turnovers over 100 h before deactivation. show potential application prospect field online hydrogen production due high performance facile preparation.