A platinum(ii)-palladium(ii)-nickel(ii) heterotrimetallic coordination polymer showing a cooperative effect on catalytic hydrogen evolution.

Stepwise construction of a 1D heterotrimetallic coordination polymer containing all three group 10 metal ions via an ammineplatinum(ii) metalloligand with d-penicillamine is reported. This system showed a significant enhancement in heterogeneous catalytic activity for electrochemical hydrogen evolution by the stepwise introduction of Pd and Ni into the Pt metalloligand.