“…The direct conversion of methane, CH 4 , to hydrogen (so-called catalytic methane decomposition, or CMD) is an attractive process for converting natural gas into high-value chemicals, mainly due to the cleanliness of the process , and the large availability of natural and shale gas reserves. , The main challenge for thermally cracking methane is the large energy required for the C–H bond cleavage; therefore, the usage of a catalyst is crucial for achieving lower temperatures for efficient conversion . The direct catalytic conversion of methane can proceed through oxidative routes, such as oxidative coupling of methane (OCM) and partial oxidation of methane (POM), and nonoxidative routes. ,, For the former, undesirable C 2 and C 3 byproducts as well as CO 2 can be formed via reactions between methyl radicals and oxygen, making the process less sustainable. , On the other hand, the nonoxidative conversion of methane can yield high selectivity toward target products. , This process generally requires high temperatures to overcome the kinetic barrier for methane cracking and hydrogen desorption, which can result in the severe deactivation of the catalyst due to coking, thus being a major drawback of metal-based catalysts. ,,, Therefore, significant effort has been made toward the design of efficient catalysts that are expected to improve the selectivity activation of C–H bonds, while being resistant to carbon poisoning. − …”