PASCA (positron annihilation spectroscopy for chemical analysis), ESCA, TA and micro-reactor have been used to study the Ni-W/Al2O3 catalysts with various Ni/W atomic ratios (R) .
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采用PASCA,ESCA,TA和微型反应色谱等技术研究了Ni-W/Al_2O_3催化体系。
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