As a conventional method of catalysis, metal-based and alloy-based dihydrogen activation show great universality. However, the selectivity of this catalytic reaction is low. Scientists have come up with some solutions (e.g., Lindlar catalyst, a Pd catalyst poisoned by CaCO3 or BaSO4, as well as Pb(II) species) to overcome this challenge. 11 Also, this method is not very environment-friendly and there is some difficulties to recycle the catalysts. 3