Physico-chemical properties of the bulk Ni₃Sn₂ alloy catalysts with different pH adjustments after reduction with H₂ at 673 K for 1.5 h.

Entry	Catalysta	S BET b (m2 g−1)	H2 uptakec (μmol g−1)	D d (nm)	Amount of acid sitese (μmol g−1)
					373–623 K (w)	623–823 K (m)	823–1023 K (s)	Total
1	Ni3Sn2 (2-Me-EtOH; pH = 6; 673 K/H2)	72.4	10	10	99	0	34	133
2	Ni3Sn2 (2-Me-EtOH; pH = 8; 673 K/H2)	101.5	9.8	14	90	99	87	276
3	Ni3Sn2 (2-Me-EtOH; pH = 10; 673 K/H2)	18.6	9.3	15	33	33	63	129
4	Ni3Sn2 (2-Me-EtOH; pH = 12; 673 K/H2)	12.0	8.6	17	18	0.0	0.0	18

^aThe value in the parenthesis is Ni/Sn molar ratio. The composition was determined by using ICP-AES.

^bDetermined by N₂ adsorption at 77 K.

^cBased on total H₂ uptake at 273 K (noted after corrections for physical and chemical adsorption).

^dAverage crystallite sizes were calculated by using Scherer's equation at 2θ = 30.37° of Ni₃Sn₂(101) alloy phase.

^eThe amount of acid sites was derived from NH₃-TPD spectra and the weak (w), moderate (m), and strong (s) acid sites are referred to the temperature regions of NH₃ desorption according to the ref. 42 and 48.