First-principles investigations were performed to elucidate the effects of A and X in Ge-based MAGeX3 perovskites (MA = CH3NH3+; X = Cl−, Br−, and I−) and AGeI3 (A = Cs+, CH3NH3+, HC(NH2)2+, CH3C(NH2)2+, and C(NH2)3+) on the photoelectronic properties.

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Well-dispersed and size-controlled Pd/RGO with highly active catalysts was synthesized through reduction of PdO/GO with hydrazine hydrate and ammonia. The electrocatalytic activity and the stability of the as-prepared Pd/RGO are much better than those of commercial Pd/C catalysts for methanol electrooxidation and the Suzuki reaction.